ANSWERS 697
depositively skewed fmode=2
2aEmails sent last week Tally Frequency
0 - 9 ©©jjjjj 6
10 - 19 ©©jjjjjjjj 9
20 - 29 ©©jjjjjj 7
30 - 39 ©©jjjj 5
40 - 49 jj 2
50 - 59 j 1
Total 30
bc 10 - 19 emails d 26 :7% e positively skewed
3a 10 days b 27 :5% c 170 - 179 vehicles dx¼ 169
4 ¼ 13 : 6 56 , x=2
6amedian= 101: 5 ,Q 1 =98,Q 3 = 105: 5
bIQR=7: 5. The middle50%of the data lies in an interval
of length 7 : 5
7ax¼ 52 : 3 b 51 cQ 1 =42
dQ 3 =61 e 32 fIQR=19
8a ix¼ 8 : 47 ii 9 iii 9 iv 4
bwell above the average cnegative
9 x¼ 7 : 58 , median¼ 6 : 90
10 a i x¼ 371 ii 372 iii 228 : 5 iv 469 : 5
brange= 682, IQR= 241
EXERCISE 14A
1ahorizontal line bvertical linecvertical line dhorizontal line2ahorizontal line bvertical line3ay=0 b x=0 cy=¡ 3 d x=4
4ay=3 b x=4
EXERCISE 14B
1a ix ¡^3 ¡^2 ¡^10123
y ¡ 3 ¡ 2 ¡ 10123
iiiii gradient=1, x- andy-intercepts are both 0
bix ¡^3 ¡^2 ¡^10123
y ¡ 9 ¡ 6 ¡ 30369
ii iii gradient=3,
x- andy-intercepts
are both 0cix ¡^3 ¡^2 ¡^10123
y ¡ 1 ¡^23 ¡^13013231
iiiii gradient=^13 , x- andy-intercepts are both 0
dix ¡^3 ¡^2 ¡^10123
y 9630 ¡ 3 ¡ 6 ¡ 9
ii iii gradient=¡ 3 ,
x- andy-intercepts
are both 002468012345678no. of
childrenfrequencyNumber of children in a household02468100 102030405060emails
sent/weekfrequencyEmails datayx6 y¡=¡6Oy-3 xx¡=¡-3Oyx-4 y¡=¡-4Oyx2x¡=¡2O336-3
-3-6-6 6xy
yx¡=¡O-9-6-3369-3 3yxyx¡=¡3O-22
-2
2yxyx¡=¡Qe_\
O-9-6-3369-3 3yxyx¡=¡-3Oscores.IB MYP_3 ANS
cyan magenta yellow black(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_an\697IB_IGC1_an.CDR Thursday, 20 November 2008 4:11:38 PM PETER